Electrically-heated liquid-receptacle.



ESCHWARTZ."

ELE TRIcALLY HEATED LIQUID REGEPTACLE.

APPLICATION FILED FEB. 24, 1912.

Patented Feb. 25, 1.913.

- UNITED STATES PATENT OFFICE.

EDWARD soHw-Aru'z, OF CHICAGO, ILLINOIS, assIGNoR T0 rELoUzE MANUFACTURING 00., oF cHIoAGo, ILLINOIS.

ELECTRICALLY-HEATED LIQUID-RECEPTACLE.

Specification of Letters Patent.

Patented Feb. 25,1913.

Application filed February 24, 1912. Serial No. 679,550.

and useful- Improvements in Electrically- Heated Liquid-Recept-acles, of which the following is a specification.

The main objects of this invention are to provide animproved construction for electrically heated devices whereby a higher efficiency and more compact structure may be obtained than is possible with usual constructions; to provide a construction which is particularly suitable for use in connection with electrically heated chafing dishes, and related devices in which the heat is applied to a plane surface and thereby transmitted to a liquid; to provide an improved construction whereby the heat transmitting surface of the dish may be brought into contact with a heating element without the use of rivets, bolts or slmilar means directly connecting them; to provide improved means for urging an electric heating element into contact with.the bottom wall of the dish; and to provide an improved method of attaching the heater casing to the dish.

An illustrative embodiment of this inven-' tion as applied to a chafing dish is shown in the accompanying drawings, in which stantial conformity with the Figure 1 is a section taken on the line A-A ofFig. 2. Fig. 2 is a bottom plan of the heating element, with its casing being removed. Fig. 3 is a sectional detail of the conductor terminals of the heating element, gle section being taken on the line BB of n the construction shown in the drawing's, the dish 1, which during operation usually contains a quantity of boiling water, and by means of which the heat is transmitted to the pan (shown in dotted lines), is a shallow clrcular receptacle having an annular shoulder 2 at the edge of its bottom wall. Depending from the dish land havmg spun connection therewith at 3, in subannular shoulder 2, is a rim or flange 4 by means of which the dish 1 is firmly and securely supported in its elevated position and which also has supported thereon by means of the.

threadedbolts 11 a truss or backin frame 5.

Thetruss 5 comprises an annu ar'rim 6- and ribs 7 and is tapped at 8 to receive the threaded screw bolt 9 by means of which the electric heating element 10 issupported and adjusted. The studs or bolts 12 have threaded engagement with the truss 5 and have their upper ends bearing on the bottom surface of the heating element lOand are adapted to'be turned to force the heating element away from the truss 5 and urge it into contact with the bottom wall of the dish 1. J

A closure 13 having an annula 1 shoulder 14; and an upwardly extending flange 15, is adapted to fit within the lower edge-of the flange 4'and is held in position by the nuts 18 which are threaded on the lower end of the studs 12 which extend downwardly through the closure. The'closure 13, the bottom wall of the dish 1, and the depending flange 4 form the casing for the heating element 10 and the truss 5.

The legs 16 are secured by bolts 17 which extend through the closure 13 and are tapped into the truss 5. These bolts 17, toget er with the studs 12, rigidly secure the legs 16 in fixed position with respect to the truss. The terminals of the electric heater 10 are connected to a pair of switch terminals 19 which projectbelow thebottom of v the casing and are suitably insulated therefrom. A shield or cover 20 is supported ontheclosure 13 and extends over the switch terminals 19.

The operation of this device is similar to' that of other devices of this character and therefore will. be readily understood from descriptio the foregoin but one specific embodiment of Although this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims. I claim I 1. An electric heating device, comprising a dish having an annular flange depending therefrom, an electric heating element, a backing frame mounted on said flange, and adjustable means bearing between said backingframe and heating element adapted to force them apart and thereby urge said heatin element into contact with the bot tom 0 said dish.

2. An electric heating device, comprising a dish having an annular depending flange,

an electric heating element, a rigid backing frame below said heating element supported on said flange, said heating element and backing frame fitting Within said depending flange, a closure, studs carried by said frame and bearing on said heating element and adapted to force them apart and to; urge said electric heater into contact with the bottom wall of said dish, said studs extending through said closure and carrying at their lower ends means for in position.

3. An electric heating device, comprising a dish having an annular depending flange, an electric heating element, a rigid backing frame below said heating element, said frame comprising a rim and ribs extending across the space within said rim, a closure, and means carried by said frame and bearsecuri'ng said closure EDWARD SCHWARTZ.

'lVitnesses A. B. HATCH, KATHERINE M. HEALY.

series of screws read with this correction therein case in the Patent Ofice.

[SEAL 25, 1913, upon the application of Edward Schwartz,

Signed and sealed this 1st day of April, A. D., 1913.

It is hereby certified that in Letters Patent No. 1,054,318, granted February of Chicago, Illinois, for an im provement in Electrically-Heated Liquid-Receptacles, an error appears in the printed specification requiring correction as follows: Page 2, line 28, for the words read central screw, and that the said Letters Patent should be that the same may conform to the record of the C. C. BILLINGS,

Acting Commissioner of Patents. 

